<template>
  <div class="header">
    <!-- 顶部条 -->
    <div class="nav-topbar">
      <!-- 主容器 w1280 -->
      <div class="container">
        <!-- 左侧菜单 -->
        <div class="topbar-menu">
          <a href="javascript:;">松果出行</a>
          <a href="javascript:;">MIUI</a>
          <a href="javascript:;">云服务</a>
          <a href="javascript:;">协议规则</a>
        </div>
        <!-- 右侧菜单 -->
        <div class="topbar-user">
          <a href="javascript:;" v-if="username">{{ username }}</a>
          <a href="javascript:;" v-if="!username" @click="login()">登录</a>
          <a href="javascript:;" v-if="username" @click="logout()">退出</a>
          <a href="/#/order/list">我的订单</a>
          <a href="javascript:;" class="my-cart" @click="gotoCart()">
            <span class="icon-cart"></span>
            购物车({{ cartCount }})
          </a>
        </div>
      </div>
    </div>

    <!-- 导航栏 -->
    <div class="nav-header">
      <!-- 主容器 -->
      <div class="container">
        <!-- logo -->
        <div class="header-logo">
          <a href="/#/index"></a>
        </div>
        <!-- 商品导航 -->
        <div class="header-menu">
          <!-- 小米手机 -->
          <div class="item-menu">
            <span>小米手机</span>
            <div class="children">
              <ul>
                <li
                  class="product"
                  v-for="(item, index) in phoneList"
                  :key="index"
                >
                  <a :href="'/#/product/' + item.id" target="_blank">
                    <div class="pro-img">
                      <img v-lazy="item.mainImage" :alt="item.subtitle" />
                    </div>
                    <div class="pro-name">{{ item.name }}</div>
                    <div class="pro-price">{{ item.price | currency }}</div>
                  </a>
                </li>
              </ul>
            </div>
          </div>

          <!-- RedMi红米 -->
          <div class="item-menu">
            <span>RedMi红米</span>
          </div>

          <!-- 电视 -->
          <div class="item-menu">
            <span>电视</span>
            <div class="children">
              <ul>
                <li class="product">
                  <a href="" target="_blank">
                    <div class="pro-img">
                      <img src="/imgs/nav-img/nav-3-1.jpg" alt="" />
                    </div>
                    <div class="pro-name">小米壁画电视 65英寸</div>
                    <div class="pro-price">6999元</div>
                  </a>
                </li>

                <li class="product">
                  <a href="" target="_blank">
                    <div class="pro-img">
                      <img src="/imgs/nav-img/nav-3-2.jpg" alt="" />
                    </div>
                    <div class="pro-name">小米全面屏电视E55A</div>
                    <div class="pro-price">1999元</div>
                  </a>
                </li>

                <li class="product">
                  <a href="" target="_blank">
                    <div class="pro-img">
                      <img src="/imgs/nav-img/nav-3-3.png" alt="" />
                    </div>
                    <div class="pro-name">小米电视4A 32英寸</div>
                    <div class="pro-price">699元</div>
                  </a>
                </li>

                <li class="product">
                  <a href="" target="_blank">
                    <div class="pro-img">
                      <img src="/imgs/nav-img/nav-3-4.jpg" alt="" />
                    </div>
                    <div class="pro-name">小米电视4A 55英寸</div>
                    <div class="pro-price">1799元</div>
                  </a>
                </li>

                <li class="product">
                  <a href="" target="_blank">
                    <div class="pro-img">
                      <img src="/imgs/nav-img/nav-3-5.jpg" alt="" />
                    </div>
                    <div class="pro-name">小米电视4A 65英寸</div>
                    <div class="pro-price">2699元</div>
                  </a>
                </li>

                <li class="product">
                  <a href="" target="_blank">
                    <div class="pro-img">
                      <img src="/imgs/nav-img/nav-3-6.png" alt="" />
                    </div>
                    <div class="pro-name">查看全部</div>
                    <div class="pro-price">查看全部</div>
                  </a>
                </li>
              </ul>
            </div>
          </div>
        </div>
        <!-- 搜索框 -->
        <div class="header-search">
          <div class="wrapper">
            <input type="text" name="keyword" />
            <a href="javascript:;"></a>
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import { mapState } from 'vuex'
export default {
  name: 'nav-header',
  data() {
    return {
      // 商品列表
      phoneList: [],
    }
  },
  computed: {
    // username() {
    //   return this.$store.state.username
    // },
    // cartCount() {
    //   return this.$store.state.cartCount
    // },
    ...mapState(['username', 'cartCount']),
  },
  mounted() {
    this.getProductList()
    let params = this.$route.params
    if (params && params.from == 'login') {
      this.getCartCount()
    }
  },
  methods: {
    // 登录跳转
    login() {
      this.$router.push('/login')
    },
    // 获取商品列表
    getProductList() {
      this.axios
        .get('/products', {
          params: {
            categoryId: '100012',
            pageSize: 6,
          },
        })
        .then((res) => {
          // 只取6条数据
          if (res.list.length >= 6) {
            this.phoneList = res.list.slice(0, 6)
          }
        })
    },
    // 购物车跳转
    gotoCart() {
      // 跳转路由
      this.$router.push('/cart')
    },
    // 退出功能
    logout() {
      this.axios.post('/user/logout').then(() => {
        this.$message.success('退出成功!')
        this.$cookie.set('userId', '', { expires: '-1' })
        this.$store.dispatch('saveUserName', '')
        this.$store.dispatch('saveCartCount', '0')
      })
    },
    // 获取购物车数量
    getCartCount() {
      this.axios.get('/carts/products/sum').then((res = 0) => {
        // to-do 保存到 VUex 里面
        this.$store.dispatch('saveCartCount', res)
      })
    },
  },
  // 过滤器
  filters: {
    currency(val) {
      if (!val) return '0.00'
      return '￥' + val.toFixed(2) + '元'
    },
  },
}
</script>

<style lang="scss">
@import './../assets/scss/base.scss';
@import './../assets/scss/mixin.scss';
@import './../assets/scss/config.scss';
.header {
  // 顶部条
  .nav-topbar {
    height: 39;
    line-height: 39px;
    background-color: #333333;
    color: #b0b0b0;
    // 主体容器
    .container {
      @include flex();
      a {
        display: inline-block;
        color: #b0b0b0;
        margin-right: 17px;
      }
      // 购物车
      .my-cart {
        width: 110px;
        background-color: #666666;
        text-align: center;
        margin-right: 0;
        // 字体图标
        .icon-cart {
          @include bgImg(16px, 12px, '/imgs/icon-cart-checked.png');
          margin-right: 4px;
        }
        &:hover {
          background-color: $colorA;
          color: #fff;
        }
      }
    }
  }

  // 导航栏
  .nav-header {
    // 主体容器
    .container {
      position: relative;
      height: 112px;
      @include flex();
      // logo

      // 商品导航
      .header-menu {
        display: inline-block;
        width: 643px;
        padding-left: 209px;
        // item
        .item-menu {
          display: inline-block;
          line-height: 112px;
          font-size: 16px;
          font-weight: bold;
          color: #333333;
          margin-right: 20px;
          // 标题
          span {
            cursor: pointer;
          }
          &:hover {
            color: $colorA;
            .children {
              height: 220px;
              opacity: 1;
              z-index: 10;
            }
          }
          // 子容器
          .children {
            position: absolute;
            top: 112px;
            left: 0;
            width: 1226px;
            height: 0px;
            opacity: 0;
            overflow: hidden;
            border-top: 1px solid #e5e5e5;
            box-shadow: 0px 7px 6px 0px rgba(0, 0, 0, 0.11);
            transition: all 0.3s;
            background-color: #ffffff;
            // 每个 li
            .product {
              float: left;
              width: 16.6%;
              height: 220px;
              font-size: 12px;
              line-height: 12px;
              text-align: center;
              position: relative;
              a {
                display: inline-block;
              }
              // 图片
              img {
                width: auto;
                height: 111px;
                margin-top: 26px;
              }
              // 图片容器
              .pro-img {
                height: 137px;
              }
              // 商品名称
              .pro-name {
                font-weight: bold;
                margin-top: 19px;
                margin-bottom: 8px;
                color: $colorB;
              }
              // 价格
              .pro-price {
                color: $colorA;
              }
              // 右侧分割线
              &::before {
                content: '';
                position: absolute;
                top: 28px;
                right: 0;
                border-left: 1px solid $colorF;
                width: 1px;
                height: 100px;
              }
              &:last-child::before {
                display: none;
              }
            }
          }
        }
      }
      // 搜索框
      .header-search {
        width: 319px;
        .wrapper {
          height: 50px;
          border: 1px solid #e0e0e0;
          display: flex;
          align-items: center;
          input {
            border: none;
            box-sizing: border-box;
            border-right: 1px solid #e0e0e0;
            width: 264px;
            height: 50px;
            padding-left: 14px;
          }
          a {
            @include bgImg(18px, 18px, '/imgs/icon-search.png');
            margin-left: 16px;
          }
        }
      }
    }
  }
}
</style>